Question: What is the extreme point lowest of United States Virgin Islands, that has tributary is Magdalena River?
Paraphrase: What is the extreme point lowest of United States Virgin Islands, that has tributary is Magdalena River?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q11703 wdt:P1589 ?answer . ?answer wdt:P974 wd:Q191829}
Answer: Caribbean Sea